64261251 has 12 divisors (see below), whose sum is σ = 92913912. Its totient is φ = 42798336.

The previous prime is 64261247. The next prime is 64261261. The reversal of 64261251 is 15216246.

64261251 is a `hidden beast` number, since 6 + 42 + 612 + 5 + 1 = 666.

It is not a de Polignac number, because 64261251 - 2² = 64261247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64261231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8020 + ... + 13886.

It is an arithmetic number, because the mean of its divisors is an integer number (7742826).

Almost surely, 2^64261251 is an apocalyptic number.

64261251 is a deficient number, since it is larger than the sum of its proper divisors (28652661).

64261251 is a wasteful number, since it uses less digits than its factorization.

64261251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7090 (or 7087 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 64261251 is about 8016.3115583166. The cubic root of 64261251 is about 400.5435340091.

Adding to 64261251 its reverse (15216246), we get a palindrome (79477497).

The spelling of 64261251 in words is "sixty-four million, two hundred sixty-one thousand, two hundred fifty-one".